MathematiCat

3rd grade perimeter worksheets

Your child adds up the side lengths to find the perimeter of a polygon, and works backward to find a missing side.

Common Core 3.MD.D.8 (Measurement and Data)

Sample problems

  1. Sample 1A fence goes around the whole rectangular playground at Oak Street School. The fence is 34 meters long. The playground is 7 meters wide. How long is the playground?

    Answer: 10 meters

  2. Sample 2A shape with 4 sides has sides of 2, 9, 7 and 7 meters. What is its perimeter?

    Answer: 25 meters

  3. A bit harderA rectangle is 6 meters long and 2 meters wide. What is its perimeter?

    Answer: 16 meters

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Perimeter